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The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

The base of a solid right pyramid is a square with an edge length of n units. the height of the pyramid is n - 1 units. sia (n-1 n